ls — list directory contents

ls [ −AacdFfhiklnqRrSstuw] [file . . .]

For each operand that names a file of a type other than directory, ls displays its name as 
well as any requested, associated information. For each operand that names a file of type 
directory, ls displays the names of files contained within that directory, as well as any 
requested, associated information.

If no operands are given, the contents of the current directory are displayed. If more than 
one operand is given, non-directory operands are displayed first; directory and non-directory 
operands are sorted separately and in lexicographical order.

The ls utility exits 0 on success, and >0 if an error occurs.

make

./ls[ −AacdFfhiklnqRrSstuw] [file . . .]

./ls file 

./ls directory